You can quite legally carry up to €10k within E.U countries without declaring it. Paying into the bank here would depend on the bank, how well they know you eyc etc....and rule of thumb above €5k the bank is obliged to ask you for proof of where the money came from. But Spain being Spain everything is a bit vague and open to interpretation.http://ec.europa.eu/taxation_customs/in ... ontrols_en